期刊论文

中文

邵阳学院学报(自然科学版)

1672-7010

2022

19

4

42-50

10.3969/j.issn.1672-7010.2022.04.006

2018-422-1-11:湖北省交通厅科技项目 B2020064:湖北省教育厅指导性科研项目

本校为第一机构

为了防止水泥基材料的收缩,在水泥基材料中加入纳米氧化镁对其进行改性.分别对改性砂浆进行力学强度试验、硫酸盐侵蚀试验以及冻融循环试验,研究水泥砂浆强度变化,以SEM试验为机理分析提供佐证.结果发现,改性砂浆的力学强度随着纳米氧化镁掺量增加而呈现先增后减的趋势,改性砂浆的抗硫酸盐侵蚀能力和抗冻性能均与力学强度变化规律相一致,且纳米氧化镁的最佳掺量为1.5％.纳米氧化镁能够提高水泥砂浆的力学强度,同时能够增加水泥砂浆抗硫酸盐能力和抗冻性能.

In order to prevent shrinkage of cement-based materials,nano-MgO was added to modify cement-based materials.This paper studies the mechanical strength of modified mortar and the change of cement mortar strength after sulfate attack test and freeze-thaw test.SEM test was used to provide evidence for mechanism analysis.The results show that the mechanical strength of modified mortar increases first and then decreases with the increase of nano-MgO content.The sulfate attack resistance and frost resistance of modified mortar are consistent with the change law of mechanical strength.The optimum con...